Mr. Jeff

Jeffery Christopher Klemm (born May 23, 1987), known professionally as Mr. Jeff and Jeff Klemm, is an American singer, songwriter, record producer, and content creator. He makes children's music, and is a member of The Recording Academy. Personal life Klemm was born and raised in Northeast Ohio and now resides in Cuyahoga Falls. His brother is songwriter and record producer Drew Louis. He has three children. He married Jillian Klemm in 2020. Klemm told Ideastream that he decided to get sober after the birth of his first son in 2016.

In 2024, Klemm debuted his first children's music as Mr. Jeff, with his debut album Wonderful Wonderful Wonderful. In June 2024, he became a member of The Recording Academy.

In August 2025, he released his third studio album, Big Kid Stuff, featuring children's musicians Miss Jessica, Fyütch, Ronnie Boy Kids, Tara Trudel, and Mega Ran. Klemm was named as a 2025–2026 Music Incubator Artist for Cleveland Rocks by the Cleveland Foundation. In May 2025, he worked on a track for Fyütch's album Harmony, which won the Grammy Award for Best Children's Music Album in January 2026.

Discography All credits adapted from Apple Music and Spotify.

As Mr. Jeff

Singles YearTitleAlbumWriter(s)Producer(s)2026“Patience”I’ve Got HeartJeff KlemmJeff Klemm“Keep Swimming” (featuring Snooknuk)Jeff Klemm, LaJuana Pigram JacobsJeff Klemm, Drew Louis2025"Run Rudolph Run"Johnny Marks, Marvin BrodieJeff Klemm"GirlDad"Big Kid StuffJeff Klemm"Picasso""Dancing Like An Animal" 2024"Wonderful Christmastime"Paul McCartney"Sleepover"Wonderful Wonderful WonderfulJeff Klemm"Poppin' Bubbles""Playin' On the Playground" "Loud In the Library"

Studio albums TitleDetailsI’ve Got Heart Released: August 21, 2026 Label: Self-released Format: Digital download, streamingBig Kid Stuff Released: August 22, 2025 Label: Self-released Format: Digital download, streamingSlumberful Slumberful Slumberful (Dreamy Piano Version) Released: October 4, 2024 Label: Self-released Format: Digital download, streamingWonderful Wonderful Wonderful Released: March 22, 2024 Label: Self-released Format: Digital download, streaming

As Jeff Klemm TitleDetailsA Fool's Delight (Deluxe Reissue) Released: January 22, 2021 Label: Self-released Format: Digital download, streamingBurying the Shadows Released: December 11, 2015 Label: Self-released Format: Digital download, streaming

As featured artist TitleYearAlbum"Power of Love" (Patrick Adams & Mr. Jeff)2025Kindies Do the 80's, Vol. 5

Awards & nominations